True. I never tried a 12.6 hard board but shorter hard ones and yes, they are more gliding. But I tried a Red Paddle inflatable (also think it was around 10') but an old one (so, less thick that the new ones), and this was definitely the lightest and quickest I've tried so far...

Any inflatable 12'6 will be faster than a rigid 10' because of its shape and length, but turning is more technical because it goes so straight. I tried the 10'6 RedPaddle that my friend rented, just to compare with my 9'5 Sroka, and of course it's so stable, but less quick because of the shape!